We've thought about this. I think we'd have to charge an import fee; encrypting GBs of data in small, useful chunks is not cheap. It might be something we offer

We've thought about this. I think we'd have to charge an import fee; encrypting GBs of data in small, useful chunks is not cheap. It might be something we offer one day, but probably not from the start (especially since, as you noted, there would be almost no security benefit).